Drill.



J. R. ABBOTT.

DRILL.

APPLICATION FILI-:D Nov. 20. IsIIv Patented Sept. 10, 1918.

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l. R. ABBOTT.

DRILL.

APPLICATION FILED Nov.2o. 19|1.

Patented Sept. 10, 1918.

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l. R. ABBOT.

DRILL APPLICATION msn Nov. 20. |911.

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Patented Sept. 10, 1918.

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J. R.- ABBOTT.

DRILL.

APPLICATION FILED Nov. 20, I9I1.

Patented Sept. 10, 1918.

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l. R. ABBOTT.

DRILL.

APPLICATION FILED NOV. 20. 1917.

Patented Sept. 10, 1918,

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inrrnn srnfrris JOHN R. ABBOTT, OF COUNCIL BLUFFS,

DRILL.

Specificationy of Letters Paten-t.

Application led November 20, 1917. Serial No. 202,993.

Y T all w/Lom it may concern.'

Be it known that I, JOHN R. ABBOTT, a citizen of the United States of America, re-

siding' at Council Bluffs, in the county of This invention, relates to a double acting compound hand driven rock drill and has for its object the production of a simple and eicient drill whereby the `same may drill two holes at one .time and is capable of being adjusted to a desired position in order that the drill may be used for tunnel shaft or Stoke work.

Another object of this invention is the production of a simple and etlicient drill wherebj7 the bull wheel ycarrying the hammer will strike as hard a blow in one position as in another position.

With these and other objects in view this invention consists of certain novel constructions7 combinations and arrangements of parts as will be hereinafter fully described and claimed.

In the drawings:

Figure l is a side elevation of the machine.

Fig. 2 is a front elevation thereof.

Fig. 3 is a top plan View of the machine, certain parts thereof being shown in section.

Fig. 4f is a longitudinal section, taken through the hull casing and the bull wheel supporting casing. l

Fig. -is a vtransverse section through the bull wheel supporting casing.

Fig. 6 is an end view of the track frame showing the operating` vcrank supported thereby. p Fig. 7 is a transverse section through the bull casing, the clamp bolts being removed therefrom.

- Fig. 8 is a side elevation of a pawl operating gear. j Y

F ig. 9 is a longitudinal section through one form of the drill used in connection with the present invention.'

Patented Sept.

Fig. 10 is a transverse 'section 50 through the chunpand water supply niember used-inV connection with the drill shown' in Fig. 9.

Fig. l1 is a reduced section taken on line A' l Y V.55

Fig. l2 is a transverse section through the"V bracket for supporting the bracing rod.'

Fig. 13 is a fragmentary, sectional view of the standard, showing Vthe sections thereof, and the` means for connecting the abutting sections. By referring to the drawings ,it will be seen that l designates lthe bu'll casing which comprises a pair of sections for tting around the standard 2. y hese sections of the bull casing lare each pro'- vided with a projecting lip 3 through which projecting lip extends a securing bolt 4 for firmly clamping the sections of the bull cas- I of the bull casing are provided vwith concave sockets 5 within which sockets' 5 the `ing 1 around the standard 2. The sections knob 6 of the threaded adjusting ro'd'.V The' g sections ofthe bull casing 1 are seated beclearly in Fig. 4 ofgtlief drawings; These tween the Vtrack engaging frames tl shown track engaging casings 8 are ,provided'witlr suitable track engaging lknuckles 9,: foi"'t`it'' ting over the longitudinally extending track- A' rails 10 carried by the track frame 411. This track frame 11 comprises a plurality of lonjoints 12 at their outer ends,V which T joints also'engagethe outer ends "of the'loop'porf tions 13 of the track frame. The'loop portions 13 carry the drill supportingcasingsV 141 to be hereinafter described.l

The'standard 2 is made up of a plurality of sections and carries a cap V15 at its upper Y end having suitable spurs 16 'formed there- Von `for engaging or gripping an abutment surface and a suitable cap 17 is Ycarried by the lower end of the standard 2. standard 2 maybe inade up of a plurality of sections such'as is illustrated in Fig. 13

wherein the two sections 18 and 19 are coni nected by means of a threaded plug 20 which Y 80 gitudiiially extending rods which engage T into the threaded ends ot the sections 18 and 19.

As stated above a drill supporting casing 14 is carried by each ot the loop portions 1I)1 and these drill supporting casings l-l are locked upon each clamp between the looped portions 13 by means ot the clamping bolts or set screws 22. These drill supporting casings 14 carry rotating sleeves 23 which sleeves firmly grip the drills Q-Ll and rotate the drills as the sleeves are rotated. The drills 211 are preferably keyed to the sleeves 23 to cause the drills to rotate therewith and at the same time permit the drills to have a free longitudinal movement therethrough. Each sleeve Q3 carries a ratchet Q5 and each ratchet 25 is engaged by means ot a pawl 26, the inner ends ot these pawls 2G being eccentrically connected to a sprocket wheel QT by means of their inwardly extending ends 2S as shown clearly in Fig. S oli the drawings. Each pawl 26 hooks through a casing 29 Carried by the drill support-ing casings 1l and these pawls 26 are so mounted in the casing 29 as to permit the same to treely move out oi engagement with the ratchets 25. A .fiat spring 30 is carried by each casing 29 and is adapted to normally torce the pawl 26 into enga gement with the respective ratchets 25. It will be seen that. upon eacli oscillation ot the gear 27 the pawls 26 will be reciprocated tor gripping the ratchet teeth upon the ratchet and causing the drills 2-1 to be rotated thereby preventing the drills troni becoming stuck in the rock in which the same are being driven. Retaining plates 31 are carried by the casings .l-iland overhang the sleeves 23 iter lirmly hol ding these sleeves within the easings 1i. A chain 32 passes over this sprocket wheel 2T and is secured at one end to the hub ot the Wheel 35 upon the pins Sil and at the other end to the pin 341 carried by the casing 37.

A sprocket wheel 2T is carried by the end plate i9 and the chain passes over this sprocket wheel 27 as shown in Fig. 1l. A coil spring 2S is carried by the chain 82 to keep the same tight over the wheels 27 and 2T and at the saine time acts as a return for returning the wheel to its normal position. This bull wheel is keyed to an operating` shatt 3G and is adapted to oscillate thereby causing the chain 32 to nioye forwardly and rearwardly for oscillating the wheel i7 and reciprocating the rods 26.

rThe wheel 235 provided with a counterbalance weight. b5 tornied upon the wheel opposite the hammer 45. The sprocket wheel 2T is carried by the outer end ot the track or gaging plates as shown in Fig. 7.

rif he shaft 23o which supports the bull wheel 35 works within the bull wheel snpporting the casing 37 and this wheel supijiortiug casing is provided with a plurality ot longitudinally extending channels 3S which channels .tit over the longitudinally extending track rails l0 oli the track traine 11 thereby firmly holding the bull wheel supporting easing 3T against accidental removal troni the track rails 10. )t gear wheel Z39 is carried by the shaft 30 and this gear wheel 39 meshes with a segmental rack bar 'O which rack bar is connected to an operating handle l19 the operating handle -l1 and rack plate -lO being pivotally mounted upon a gin t2 carried by the supporting arm 13. A coil spring 11,: is connected to one end et the handle ll and at the other end this spring -lconnected to the gear wheel Z39 for causing the gear wheel to return to its lnormal position atter the saine has once been rotated by the rack plate l0.

A hammer l5 is carried by the periphery ot the bull wheel $35 and this hammer i5 is adapted to swing alternatelyrv into engagement with the rear end et the drills Z-l the spring elfacting as a return means tor assisl'ing in retm'ning the bull wheel. The rebound ot` the hammer #i5 will also grcatl \v assist the swinging ot the bull wheel to its re verse position or operation.

liy considering the drawings especially Figs. l and 2 it will be seen that the pair ot collars 4G are mounted upon the standard and these collars lo carry links t7 which links in turn engage the bull casing ci' traine 1. rihe collars itl are engaged by means ot the bracing rods itl which rods 11B pass over the end plate i5) carried by the rear ends ot the track rods i0. This end plate l-) is pro- .vided with a plurality ot clamping plates 50 tor engaging the rods or cables i8 and tirinlv holding the same against slipping. u

TheJ adjusting rod 'i' is threaded through the bull wheel carrying casina` 25T and` a crank handle 51 is carried by the outer end ot this adjusting rod and it should be understood that the bull wheel may be moved forwardly or rearwardly to snit the conyenienee ot" the operator by merely the rotation of thc Crank 5l. I

ily considering Fig. 7 it will be seen that thebnll easing 5 carries the track engaging casings S as aboye described, and these track engaging casings are pr vided with end plates 52 which end plates 52 are provided with apertured ends for fitting over the track rods 10. rlhe track engaging ends S as weil as the plates are provided with apertures 5l through which the securing bolts 5a pass. l

fis shown in Figs. 9 and 10 oi" the drawings the drill 2t may be provided. with a longitudiinilly extending aperture 5G extending toward thc outerbnd 5T et the drill in order to permit water to be passed therethrough.- T-lie-bit Q41 is provided with a socket .57d` near its rear .end .over which socket 57a tits the clamp v58. of the water supply nozzle .5.9. This water nozzl-e59 is provided with a supply aperture 60 connected with an aperture l611 formed inthe bit 2i. A suitable iexible hose 69. may be con- 'iiected to-the nozzle 59 for the purposeof conveying liquid thereto.

A bracing rod 63 is carried-by the plate nately engaging the rear ends of said bits for driving the same into a hard substance.

2. A drill of the class described comprising a casing,A a. bull ivheel supporting'k casing mounted upon said first mentioned casing, means for adjusting said bull wheel supporting casing', drills carried by said iirst vmentioned casing, and means carried by said bull Wheel for driving Said bits into a hard substance.

3. A drill of the class described compris'- ing a frame, a track-Way carried upon said frame, a bull Wheel supporting casing slidably mounted upon said track-Way, drills carried by said frame, and a bull wheel engaging said drills for driving the same into a hard substance.

4. A drill of the class described comprising a frame, a bull Wheel supporting casing, track-Ways mounted upon said frame, said bull Wheel supporting casing slidably mounted upon said track-Ways, an adjusting rod carried by said frame and engaging said bull Wheel supporting frame for moving the same longitudinally upon said trackf Ways and supporting said Wheel in an adjusted position, drills carried by said frame, and means carried by said bull Wheel for driving said drills. Y

5. A drill of the class described comprising a frame, a bull Wheel supporting casing, track-Ways mounted upon said frame, and bull Wheel supporting casing slidably mounted upon said track-Ways,`an adjusting rod carried by said frame and engaging said bull Wheel supporting iframe for moving the same longitudinally upon saidtrack- Ways and supporting said bull Wheel in an adjusted position, drills carried by said frame, and means carried by said bull Wheel for driving said drills, an operating handle, a gear cooperating with said bull Wheel, and, .a :segment vcarried by Said operating handler and engaging lsaid gear for oscillating said bull Wheel. i 'n 6. A drill of the class describedy comprising frame,- a bull Wheel supporting casing,

f track-Ways mounted` Vupon said frame, said f supporting casing .rslidabgly' bull Wheel mounted :upon -sa-id track-Ways, an adjusting rod carried by said frame and engaging said bull Wheel" supporting traine vfor movthe same longitudinally upon Sadtrmk ways and supporting said bull Wheel in an adjusted positiom drills carried by said frame, and means car ied by said bull Wheel' for driving said drills, an op'eratinghandle,`

a gear cooperating with said bull Wheel, and

a segment carried by said operating handle and engaging said gear for oscillating said bull Wheel, a spring for assisting and returning said bull Wheel to a neutral position. l 7. A drill of the class described comprising a frame, a standard supporting said frame, a bull casing, a track supported upon said bull casing, drills, a bull Wheel forV operating said. drills, a casing supporting said bull Wheel, and means for adjusting the position of said bull Wheel.

8. A drill of the class described, a irame, a standard supporting said frame,V a bull casing, a track supported upon said bull casing, drills, a bull Wheel for operating saidA drills, a casing supporting' said bull wheel.

and means for adjusting the position of said bull Wheel, bracing -means secured to'said standard and engaging the rear yend of said track frame for preventing Said track from sagging at its rear ends.

9. A drill of the class described comprising a frame, a track-Way lformed upon saidV Y frame, drill supporting casings carriedV by said track-Way, drills carried by said casings, means for driving said drills, said driving means being movably mounted on said trackivay, and meansfor automati-f' cally rotating said drills asrtlie samearef driven. Y n 10i A drill of the class described comprising a frame, drill bits, a casing for supporting each drill '.bit, means for driving said drill bits, ratchets for rotating said -drill bits, an oscillating driving Wheel, alsprocketv as said driving Wheel is oscillated, a second sprocket, said chain also passing over said secondv sprocket, and a coil spring' carried by said chain.

1Q. A drill of the class described comprising a frame, drills carried thereby, a bracing rod for lhe rear end or' Said frame, n bracket carried by 'he rear end of said frame and supporting said brace rod, said bracket provided with i swivel end and n set screw engaging said brace rod sind fnrried by Said swivel end for holding` said rod in a set posi- JOHN R. ABBOTT.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents. Washington, D. C. 

